function addTab(title, href, iconCls, iframe){
	var tabPanel = parent.$('#wu-tabs');
	if(!tabPanel.tabs('exists',title)){
		var content = '<iframe scrolling="auto" frameborder="0"  src="'+ href +'" style="width:100%;height:100%;"></iframe>';
		if(iframe){
			tabPanel.tabs('add',{
				title:title,
				content:content,
				iconCls:iconCls,
				fit:true,
				cls:'pd3',
				closable:true
			});
		}
		else{
			tabPanel.tabs('add',{
				title:title,
				href:href,
				iconCls:iconCls,
				fit:true,
				cls:'pd3',
				closable:true
			});
		}
	}
	else
	{
		tabPanel.tabs('select',title);
		var current_tab = tabPanel.tabs('getSelected');  
		tabPanel.tabs('update',{  
		     tab:current_tab,  
		     options : {  
		          content : '<iframe scrolling="auto" frameborder="0"  src="'+href+'" style="width:100%;height:100%;"></iframe>',  
		      //或者 href : '';  
		     }  
		});  
	}
}